Advertisements
Advertisements
प्रश्न
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Advertisements
उत्तर
The kinetic energy at the highest point is zero because at the highest point, velocity of the high jumper becomes zero.
APPEARS IN
संबंधित प्रश्न
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason.
A pendulum is oscillating on either side of its rest position. The correct statement is:
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Name the device or machine which convert :
Chemical energy into heat energy.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
What kind of energy transformation take place at a hydroelectric power station?
Describe the energy changes which take place in a radio.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
When an object falls freely towards the earth, then its total energy :
A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?
